/*
    * Licensed to the Apache Software Foundation (ASF) under one or more
    * contributor license agreements.  See the NOTICE file distributed with
    * this work for additional information regarding copyright ownership.
    * The ASF licenses this file to You under the Apache License, Version 2.0
    * (the "License"); you may not use this file except in compliance with
    * the License.  You may obtain a copy of the License at
    *
    *      https://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  /*
   * This is not the original file distributed by the Apache Software Foundation
   * It has been modified by the Hipparchus project
   */
  package org.hipparchus.optim;
  
  import org.hipparchus.exception.MathIllegalArgumentException;
  import org.junit.jupiter.api.Test;
  
  import static org.junit.jupiter.api.Assertions.assertFalse;
  import static org.junit.jupiter.api.Assertions.assertThrows;
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  class SimpleVectorValueCheckerTest {
      @Test
      void testIterationCheckPrecondition() {
          assertThrows(MathIllegalArgumentException.class, () -> {
              new SimpleVectorValueChecker(1e-1, 1e-2, 0);
          });
      }
  
      @Test
      void testIterationCheck() {
          final int max = 10;
          final SimpleVectorValueChecker checker = new SimpleVectorValueChecker(1e-1, 1e-2, max);
          assertTrue(checker.converged(max, null, null));
          assertTrue(checker.converged(max + 1, null, null));
      }
  
      @Test
      void testIterationCheckDisabled() {
          final SimpleVectorValueChecker checker = new SimpleVectorValueChecker(1e-8, 1e-8);
  
          final PointVectorValuePair a = new PointVectorValuePair(new double[] { 1d },
                                                                  new double[] { 1d });
          final PointVectorValuePair b = new PointVectorValuePair(new double[] { 10d },
                                                                  new double[] { 10d });
  
          assertFalse(checker.converged(-1, a, b));
          assertFalse(checker.converged(0, a, b));
          assertFalse(checker.converged(1000000, a, b));
  
          assertTrue(checker.converged(-1, a, a));
          assertTrue(checker.converged(-1, b, b));
      }
  }